Segment Information (Schedule Of Financial Information Attributable To Geographic Regions) (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net Sales	$ 881.7	$ 925.4	$ 959.7	$ 878.8	$ 3,645.6	$ 3,360.3	$ 3,224.5
Long-Lived Assets	623.0				615.5	623.0
United States
Segment Reporting Information [Line Items]
Net Sales					2,402.9	2,267.2	2,212.6
Long-Lived Assets	263.6				242.7	263.6
Mexico
Segment Reporting Information [Line Items]
Long-Lived Assets	136.3				139.7	136.3
China
Segment Reporting Information [Line Items]
Long-Lived Assets	99.5				90.2	99.5
Rest of the World
Segment Reporting Information [Line Items]
Net Sales					1,242.7	1,093.1	$ 1,011.9
Long-Lived Assets	$ 123.6				$ 142.9	$ 123.6